The most powerful and durable GSE heaters on the market today are the Spencer Coldbuster Mark IV’s. The Mark 4-900 delivers clean and filtered hot air at 165-180 degrees above ambient in sub-zero climates. Capable of delivering 900,000 BTU’s at up to 6,000 cfm, this heater cart can handle any commercial aircraft in service today.

The Mark 4-900 uses the “turbo- dynamic” heat exchanger technology maximizing exhaust heat. Hot airflow can be fully regulated for use with all size aircraft using our “VariFlo” control. New for 2014 is the 50% increase in duct storage space, by moving the rear wheels outside of the frame, also giving our unit additional stability.